Warp-thread-tension indicator for dressers.



G. D. DE GRANDPRE.

WARP THREAD TENSION INDICATOR FOR DRESSERS.

APPLIGATION FILED JULY 29, 19,13..

Patented July 14;, 1914.

UNITED STATES PATENT OFFICE.

WARP-THREAD-T ENSIO'N INDICATOR FOR DRESSERS.

il,il03,131l.

To all whom it may concern:

Be it known thatI, GEORGE D. on GRAND- PRE, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Wa'rp-Thread-Tension Indicators for Dressers, of which the following is a specification.

In the usual construction and operation of war dressing machines, as heretofore, the warp t lireads, usually 400 to 500 in numher, come from the creel or spool rack to the dresser size rolls. From the size rolls the warp threads are carried back and forth around rolls at each end of the dresser and over steam coils to the upper front roll, which is rotatably supported in a fixed position in the machine. The warp threads now go from this upper front roll, under tension, to the reel on which they are wound, forming one section of Warp threads on the reel. The reel is then moved transversely the distance of one section of warp threads and these operations are repeated until the entire length of the reel is filled with. sections of warp threads. The sections of warp threads now go to the beamer and are all wound on to the warp beamsimultaneously. If the sections of warp threads on the reel vary in tension and height there will be a corresponding variation in the tension and height of the warp threads on the warp beam, thereby causing an imperfect weave in the cloth. In order to keep the tension of the warp threads, from the dresser to the reel, as uniform as possible, the operator tightens or loosens the belt on the'reel, as he thinks the same is required. As there is nothing heretofore but the operators skill or judgment to indicate to him whether the warp threads are running under the required uniform tension or not the sections of warp threads on the reel usually vary more or less both in tension and height. These variations in the tension and height of the sections of warp thread are sometimes so great as to necessitate the unwinding and rewinding of on or more sections of thread to bring them all to a uniform tension and height.

My invention has reference to an improvement in warp dressing machines and more Specification of Letters Patent. Application filed July 29, 1913. Serial No 781,792.

Patented July 14, 1914.

particularly to an improvement in warp thread tension indicators, for warp dressing machines.

The object of my invention is to provide a warp dresser with a w p thread tension indicator, whereby when the tension of the warp threads varies from the uniform tension required, the same will be mechanically indicated, thereby eliminating the factors of chance and more or less skill or judgment of the operator heretofore depended upon, and which varies largely in dilferent operators.

' A further object of my invention is to simplify the construction of a warp thread tension indicator, thereby reducing the cost of manufacturing, installation and maintenance of the indicator.

My invention consists in the peculiar and novel construction of a warp thread tension indicator for dressers, said tension indicator having details of construction, as will be more fully set forth hereinafter and claimed.

Figure 1. is a side view'of the upper front portion of a warp dresser provided 'Wltll my improved warp thread tension indicator and showing the greater portion of the dresser broken away. Fig. 2; is an enlarged side view of the warp thread tension indicator and adjacent portion 'of the 'dresser, and Fig. 3. is an enlarged sectional view taken on line 3. 3. of Fig; 1, looking down on the indicator and showing the left hand indi'cator partly in section and the central portion of the roll broken away.

All of the figures show the indicator in an intermediate position indicating a medium tension on thowarp threads.

In the drawing, 5 indicates the upper front portion of a warp dresser, 6 my improved warp thread tension indicator and 7 the Warp threads. The dresser 5 has the usual side frames 8. 8., rolls 9. 9. steam coils 10. 10. and upper front roll 11.'which is not in a fixed position as heretofore.

Two of my improved Warp thread tension indicators are used, one at each end of the cally the same construction a description of one Wlll therefore answer for both.

In the preferred form the indicator con upper front roll 11. As both have identisists of two brackets 12. 12. each having a transverse hole 13. and secured to the side frames 8. 8. of the dresser 5. in a position to bring the holes 13. 13. in alinement with each other and with the trunnion 14. on the roll 11. A rod 15 is slidably supported in the holes 13. 13., in the brackets 12. 12. and has a central bearing 16. in which the trunnion 14. of the roll 11 is rotatably supported... A

stop collar 17 is adjustably secured to the rod 15. intermediate the front bracket 12 and the bearing 16. by a screw 18 and limits the forward movement of the rod 15. A

coiled spring 19. is supported on the rod 15.

In the operation of my improved warp.

thread tension indicator, the warp threads 7. are carried back and forth around the rolls 9. 9. and then over the upper front roll 11. in the usual way. The warp threads now go from the roll 11. under tension to a reel, not shown. The operator obtains the required tension. on the warp threads 7, by. adjusting the idle pulleys on the reel belt, not shown, to tighten or loosen the belt.

When the required tension of the warp threads 7 is obtained the operator puts a chalk mark 24. on the face of the indicator arms 20, 20. opposite the pointed end of the pointer fingers 23. 23., as shown in Fig. 3. If the tension increases on the warp threads, the roll 11 will move toward the rear of the dresser against the tension of the springs 19. 19. and through the rod 15. and collar 21. moving in unison with the roll 11. the pointer fingers 23. 23. will move away from the chalk marks 24. 24. toward the rear of the machine, indicating that the tension on the warp threads has increased, and that the same are not running undcrthe uniform tension required. If the tension on the warp threads decreases the coiled springs 19. 19. will move the roll 11, rods 15. 15. and pointer fingers 23. 23. away from the marks 24. 24. toward the front of the dresser, indicating that the tension on the warp threads has decreased below the uniform tension required. When the warp threads tighten or loosen beyond a predetermined uniform tension, as shown by the indicator, the operator loosens or tightens the belt on the reel, (not shown) thereby adjusting the tension on the warpthreads until the required tension is obtained, as

indicated by the pointer fingers 23. 23. again coinciding with the marks 24. 24. on the indicator arms 20. 20. When one section of warp threads is wound on the reel under the required uniform tension the next section of warp threads are wound on the reel under the same identical tension by adjusting the tension on the threads so as to bring thepointer fingers 22. 22. on a line with the same marks 24. 24. These operations are repeated until. the reel is now filled with a plurality of seotions.of warp thread, each section having identically the same uniform tension and height or thickness of threads. When the sections of warp threads are now wound from the reel on to the warp beam the warp beam will be filled with sections of warp threads each of which will have the same uniform tension and height or thickness, as is required to obtain a perfect or uniform weave in the cloth.

-Having thus described. my invention 1 claim as new 1. In a warp dressing machine having a on the rod rotatably supporting the roll, a I

stop collar adjustably secured to the rod intermediate the forward rod bearing and the fixed bearing on the rod, a coiled spring on the rod engaging with the fixed bearing on the rod and with the rear rod bearing, a flat elongated indicator arm, means for securing one end of the indicator arm to the rear rod bearing, a collar adjustablys'ec'ured to the rear end of the rod, outside of the rod bearing and under. the indicator arm, an indicator finger on the collar shaped to extend upward and over the indicator arm, said indicator arm having a flat uppersurface adapted for marking on with a piece of chalk or similar marking substance. 2. In a warp dressing machine, a' warp thread tension indicator comprising bearings 12. 12., a rod 15', slidably supported in the bearings 12. 12., a fixed bearing 16 on the rod 15, for rotatably supporting a roll in the dressing machine, a stop collar 17 adjustably secured to the rod 15intermediate the forward bearing 12 and the fixed bearing 16 on the rod, a coiled spring 19 on .the rod engaging with the fixed bearing 16 on the rod and with the rear rod bearing-12, a

fiat elongated. indicator arm 20 secured at.

one end to the rear rod bearing 12, a collar 21 adjustably secured to the rear end of the rod 15 outside of the rod bearing 12 and under the indicator arm 20, an indicator finger 23 on the collar 21 and shaped to ex-' upper face, whereby the position of the name to thisspecification in the presence of indicator finger 23 relative to the indicator two subscribing Witnesses.

arm 20 may be indicated by placing an GEO. D. DE GRANDPRE. erasable mark on the blank face of the Witnesses: 5 indicator arm 20. I JOHN H. MCNULTY,

In testimony whereof, I have signed m CHAs. H. LUTHER. 

